| Sean Gallup/Getty Images

Earth’s Altered Geology: Photos

Here are six ways humans are permanently changing the deep Earth, from mining to underground nuclear testing.

August 13, 2014
7:00 AM EDT
| 663Highland, via Wikimedia Commons
A North Sea oil platform | 4ing, via Wikimedia Common
| U.S. Department of Energy
| National Nuclear Security Administration / Nevada Site Office
| Joseph Barillari, via Wikimedia Commons
| Tony, via Wikimedia Commons